Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3415in Stem

Manley Performance Products' Extreme Duty Series exhaust valves are built for the toughest Big Block Chevy applications. If you're working on a high-performance marine engine, a Top Fuel dragster, or a restricted circle track motor, these valves are designed to handle extreme heat and force where others might fail. They are specifically crafted to meet the demands of specialized racing and heavy-duty marine use.

The core of these valves is Manley's XH-432 XtremeAlloy, a material chosen for its exceptional resistance to the intense conditions found in high-horsepower engines. You'll also find chrome stems and hard tips, which add significant durability and wear resistance, meaning these valves are built to last through many demanding cycles. The under-head areas are swirl polished to help smooth airflow into the combustion chamber, and the combustion faces are fully machined to optimize how the air and fuel mixture burns. This attention to detail in material and machining helps improve overall engine performance and efficiency.

When you're building an engine that pushes the limits, using components designed for those extremes is crucial. These Manley valves are a solid choice for anyone needing robust exhaust valve performance for specialized Big Block Chevy builds.